EP 0519379 A3 19930113 - SURVEILLANCE CAMERA WITH AUTOMATIC EXPOSURE CONTROL
Title (en)
SURVEILLANCE CAMERA WITH AUTOMATIC EXPOSURE CONTROL
Publication
Application
Priority
- JP 14447991 A 19910617
- JP 9052892 A 19920410
Abstract (en)
[origin: EP0519379A2] An object of the present invention is to control the lens iris and shutter speed such that automatic light quantity adjustment is made of an object the image of which is to be picked up without being influenced by the ambient quantity of light. Another object of the present invention is to control the shutter speed of an image pickup camera to pick up the image of a target object during the rotation of a rotational stand without allowing the image to flow asynchronously. An image pickup camera 1 comprises a vertical position detector 12 and a horizontal position detector 13 for detecting the rotational position of the camera 1. Data 21 on control over the quantity of light for the detected positional information 20 is beforehand stored in a correction data storage 14. Correction data 21 for the position information 20 is delivered to the camera 1. A lens iris driver 10 subtracts the correction data 21 from the quantity of light from a lens 2 to produce a signal to automatically control the light quantity of the lens iris 11. <IMAGE>
IPC 1-7
IPC 8 full level
H04N 5/235 (2006.01); H04N 5/238 (2006.01); H04N 7/18 (2006.01)
CPC (source: EP US)
G03B 7/085 (2013.01 - EP US); H04N 7/18 (2013.01 - EP US); H04N 23/70 (2023.01 - EP US); G03B 2217/18 (2013.01 - EP US)
Citation (search report)
- [A] US 4468700 A 19840828 - SMITH WILLIAM V [US]
- [A] EP 0222641 A1 19870520 - I2S [FR]
- [A] FR 2547426 A1 19841214 - MATRA [FR]
- [A] PATENT ABSTRACTS OF JAPAN vol. 13, no. 16 (E-703)13 January 1989 & JP-A-63 221 772 ( CANON INC ) 14 September 1988
- [A] PATENT ABSTRACTS OF JAPAN vol. 13, no. 568 (E-861)21 September 1989 & JP-A-01 236 779 ( MATSUSHITA ELECTRIC IND CO LTD ) 21 September 1989
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0519379 A2 19921223; EP 0519379 A3 19930113; EP 0519379 B1 19960904; DE 69213345 D1 19961010; DE 69213345 T2 19970327; JP 3151921 B2 20010403; JP H05137064 A 19930601; US 5589875 A 19961231
DOCDB simple family (application)
EP 92110073 A 19920615; DE 69213345 T 19920615; JP 9052892 A 19920410; US 34470394 A 19941121